Abstract: A wavefront analyzer comprises a network of adjustable converging microlenses dividing an incident wavefront into multiple beams and creating a respective focal point for each beam, and a network of light-sensitive detectors placed behind to detect positions of these focal points. The microlenses network is formed from a liquid crystal layer operating in transmission with an array of electrodes forming liquid crystal pixels whose refractive index is controllable by a voltage applied individually to each electrode. Each converging microlens comprises a subset of pixels grouped in a region constituting the microlens, the pixels of a subset having indices that vary radially in a monotonic manner by distance from a central point of the region to its edges, enabling the microlens to operate in refractive mode. The number, position, size and focal length of the microlenses can be adjusted by the profile of the voltages applied to the array of pixels.

Abstract: The invention relates to an integrated circuit comprising: a first semiconductor well (60); a plurality of standard cells (66), each standard cell comprising a first field-effect transistor in FDSOI technology comprising a first semiconductor ground plane located immediately on the first well; and a clock tree cell (30) contiguous with the standard cells, the clock tree cell comprising a second field-effect transistor in FDSOI technology, which transistor comprises a second semiconductor ground plane located immediately on the first well (60), so as to form a p-n junction with this first well. The integrated circuit comprises an electrical power supply network (51) able to apply separate electrical biases directly to the first and second ground planes.

Abstract: An oxygen/hydrogen fuel cell including a package having, on the side of the cell intended to be exposed to air, an enclosure provided with a mobile cap; an element made of a material which deforms according to the humidity ratio in the package; circuitry for controlling the opening and the closing of the mobile cap; and a switch which opens and closes according to the deformation of said material, said switch being associated with control means.

Abstract: A processor for processing digital data includes at least one butterfly operator for executing an FFT/IFFT computation. This butterfly operator contains a first stage of complex multiplication and a second stage of complex addition and subtraction. Each of these two stages contains a plurality of addition/subtraction hardware modules and data transmission links between these modules. At least a part of the addition/subtraction modules of each stage of the butterfly operator and at least a part of the links between these modules are configurable with the aid of at least one programmable parameter, between a first configuration in which the butterfly operator carries out said fast Fourier transform computation and a second configuration in which the butterfly operator carries out a computation of branch metrics values and of path metrics and survivors values of a Viterbi algorithm.

Abstract: Optoelectronic device including light-emitting means in the form of nanowires (2, 3) having a core/shell-type structure and produced on a substrate (11), in which said nanowires comprise an active zone (22, 32) including at least two types of quantum wells associated with different emission wavelengths and distributed among at least two different regions (220, 221; 320, 321) of said active zone, in which the device also includes a first electrical contact zone (15) on the substrate and a second electrical contact zone (16) on the emitting means, in which said second zone is arranged so that, as the emitting means are distributed according to at least two groups, the electrical contact is achieved for each of said at least two groups at a different region of the active zone, and the electrical power supply is controlled so as to obtain the emission of a multi-wavelength light.

Abstract: The invention relates to a monofrequency optical filter, including reflective elements which are formed on one surface of a dielectric support layer and which define at least one periodic array of parallel grooves passing across same. The periodicity, height, and width of said periodic groove array are selected so as to form a structure, the wavelength of which can be selected from within a predetermined range of wavelengths. According to the invention, the thickness and refractive index of the support layer are selected so that said layer forms a half-wave plate for a wavelength of the predetermined wavelength range. The filter, when in contact with the surface of the support layer opposite the surface on which the groove array is formed, includes a medium, the refractive index of which is less than that of the support layer so as to obtain a guided mode that resonates in the support layer.

Abstract: A hybrid substrate comprises first and second active areas made from semiconductor materials laterally offset from one another and separated by an isolation area. The main surfaces of the isolation area and of the first active area form a plane. The hybrid substrate is obtained from a source substrate successively comprising layers made from a first and second semiconductor materials separated by an isolation layer. A single etching mask is used to pattern the isolation area, first active area and second active area. The main surface of the first active area is released thereby forming voids in the source substrate. The etching mask is eliminated above the first active area. A first isolation material is deposited, planarized and etched until the main surface of the first active area is released.

Abstract: An electronic component comprising a substrate extending in a plane, having electrical connections to connect the component to a circuit, and having an upper face; an electronic chip arranged on the upper face or inside the substrate and connected to the connections via the substrate, a thick insulating layer forming a package and covering the upper face or at least part of the chip, and having an outer face parallel to the plane; a cavity inside the thick layer, the cavity having a bottom parallel to the plane and a side extending from the bottom to the outer face, the cavity having heat-absorbing material inside that is different from the material forming the thick layer. The heat-absorbing material has a specific heat capacity greater than 1 kJKg?1K?1 at a 25° C. and at 100 kPa. Either a bottom or side of the cavity is covered with a interface layer.

Abstract: A converter circuit to be connected to an electrical energy source includes a chopper circuit having an input terminal capable of being connected to said electrical energy source, a first output circuit adapted to being connected via a first switch to an output terminal of the chopper circuit, a second output circuit adapted to being connected via a second switch to the output terminal of the chopper circuit, and a control circuit. The control circuit is adapted for controlling the duty cycle of the chopper circuit as a function of the variation in voltage of said electrical energy source, and switching between the first and second switches as a function of a range of output voltage settings for the first output circuit.

Abstract: The structure intended to emit electromagnetic radiation, comprises first and second electrodes configured so as to allow carriers to be injected into at least one semiconductor-based stack with a view to making them recombine in an active zone of the stack in order to form all or some of the electromagnetic radiation to be emitted. The first electrode has at least one first face for injecting carriers into the stack, said face being oriented in a different direction to the direction in which the stack is formed. The second electrode comprise a second face for injecting carriers into the stack, wherein said second injection face comprises a first portion facing the first electrode and a second portion for which the first electrode is not facing, and a dielectric element, making contact with the first electrode, is interposed between at least one part of the first electrode and at least one part of the first portion.

Abstract: The invention provides a process for treating an n-type photovoltaic cell free from all but trace amounts of boron atoms, said process comprising the following steps: providing an n-type heterojunction photovoltaic cell (10) comprising a central crystalline silicon layer (1) on and under which two passivation layers (2, 3) made of hydrogenated amorphous silicon are deposited; heating this cell to a temperature between 20° C. and 200° C., for example on a hot plate (20) or in an oven (40), while illuminating the photovoltaic cell with a light flux from a light source (30). The efficiency of the photovoltaic cell is thus improved and stabilized.

Abstract: An optical filter for filtering an electromagnetic radiation of variable angle of incidence, includes a stack of at least one dielectric or semi-conductor layer arranged between two partially reflective layers, said stack defining a set of Fabry-Pérot cavities set to a predetermined wavelength. The average refractive index of the dielectric or semi-conductor layer is variable in a plane orthogonal to the direction of the stack so as to compensate the effects of the variation in the angle of incidence of the electromagnetic radiation on the transmission spectrum of the cavities.

Abstract: This invention relates to improvements in therapeutic neurological and neuropsychic treatments using acetylcholinesterase inhibitors. More specifically, the invention enables the effects of the reversible acetylcholinesterase inhibitor donepezil to be potentiated by certain molecules, referred to here as connexin-blocking agents. Said connexin-blocking agent is preferably meclofenamic acid.

Abstract: The invention relates to the locating and identifying of objects with radiofrequency communication by inductive coupling, without electrical contact, between a reader and a tag. The device includes an array of N fixed RFID markers of RFID tag type, with inductive antennas placed at known positions, N being an integer greater than 1 and an RFID tag reader provided with a fixed reading inductive antenna passing in proximity to the N markers. The position of the N markers with respect to the inductive reading antenna is such that the mutual inductance between the inductive antenna of any marker and the inductive reading antenna is zero when no object to be located is present in the vicinity of the array of markers, and nonzero when an RFID tag is present in the vicinity of the marker considered. A coupling is established in the presence of a mobile tag in proximity to a marker.

Abstract: The invention relates to the use of diazonium salts for the formation of thick layers on at least one surface of a substrate. The diazonium salts used in the invention have the following formula (I): wherein R is a group that can be electrochemically reduced in a reversible manner to a cathodic potential between 0 and ?1.5 V, E is a spacer chain consisting of at least one aromatic cyclic group having between 5 and 6 links, optionally containing at least one heteroatom preferably selected from N, S, O or P and optionally substituted by at least one group selected from the C1-C5 alkyls and the halogens, r is 1 or 2, m is a whole number between 1 and 5 inclusive, p is a whole number between 1 and 5, and B is a counter-ion. The invention can be especially applied to the field of gas sensors.

Abstract: A first substrate provided with a receiving area made from a first metallic material is supplied. A second substrate provided with an insertion area comprising a base surface and at least two bumps made from a second metallic material is arranged facing the first substrate. The bumps are salient from the base surface. A pressure is applied between the first substrate and the second substrate so as to make the bumps penetrate into the receiving area. The first metallic material reacts with the second metallic material so as to form a continuous layer of an intermetallic compound having a base formed by the first and second metallic materials along the interface between the bumps and the receiving area.

Abstract: Device (20) for purifying a molten material such as silicon, comprising a chamber (21) comprising a crucible (2; 15) for storing a molten material and a heating device (4) for heating the molten material contained in the crucible, the chamber being equipped with a device (22) for greatly lowering the pressure in the chamber, characterized in that it comprises at least one evaporator (10; 10, 10?) placed inside the chamber to receive part of the molten material, such that this molten material has a large interface with low-pressure vapour present in the chamber (21) to promote and accelerate the purification of the molten material.

Abstract: The method for instrumenting a container, especially intended to receive an assortment of materials, capable of being set moving in a preset coordinate system, said method comprises the following steps: placing at least one communicating element in the container on an internal surface of the container; and tracking the location of each communicating element over time in the preset coordinate system.

Abstract: A component emitting light radiation comprising a vertical junction supported on a substrate, the face of the substrate opposite the face on which the junction is made is provided with at least one first conducting zone dedicated to electrical contact and a second conducting zone insulated from the substrate and from the first conducting zone, the second zone being dedicated to heat dissipation.

Abstract: The invention relates to a flat screen (E) that comprises an active pixel matrix (M), an electrode that is common to said pixels (C), and a conductive strip (R) preferably in the form of a ring that is connected to said common electrode and at least partially surrounds said active matrix, characterized in that at least one slot (F) defining an antenna is formed in said conducting strip. The invention also relates to a portable apparatus that comprises: such a flat screen (E); an electronic board including a floorplan (PM) parallel to the flat screen and electrically connected to the conductive strip of the same; a means for generating and/or detecting electric radiofrequency signals; and an excitation port (P) for the slot antenna (F) installed in the flat screen, and connected to said means for generating and/or detecting electric radiofrequency signals.